Looking for popular multiplayer games? Ones who actually have full rooms.

I can't seem to find any popular multipayers games. Armageddon Squadron's room is a ghost yards. It seems like polarbit has great games but no one plays them online. Can anyone suggest any other flying, shooting, racing games that people actually play. I am not interested in quest games or WoW types games. I know some games have the capability but no one uses it.